Hello everyone - I have a Graflex xlsw and am using the 47mm f:8 lens. I am using it without a spacer and find that if I attached a slim b+w 40.5mm uv filter I get a visible vignetting on the corners when shooting at f:22. There is no vignetting when I shoot the same situation without a filter but I am using the camera in the field and would like to protect the front element. I also want to use an ND filter for another shot but need to find a solution. I am thinking of getting a step-up ring 40.5 -46mm but thought I would ask for suggestions on the best solution.

I assume you are using a screw in filter, if so, you might solve this problem by using a press on adapter ring and Series VII or larger filters instead of the screw in ones. That might just give enough more clearance for the edges of the image circle.